CN201916008U - Expansion power energy-saving system with high flow, low parameter and high back pressure - Google Patents

Expansion power energy-saving system with high flow, low parameter and high back pressure Download PDF

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Publication number
CN201916008U
CN201916008U CN2010206177534U CN201020617753U CN201916008U CN 201916008 U CN201916008 U CN 201916008U CN 2010206177534 U CN2010206177534 U CN 2010206177534U CN 201020617753 U CN201020617753 U CN 201020617753U CN 201916008 U CN201916008 U CN 201916008U
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China
Prior art keywords
heat supply
heater
energy
steam turbine
back pressure
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Expired - Fee Related
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CN2010206177534U
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Chinese (zh)
Inventor
宋涛
陈洁
姜培朋
李锦青
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SHANDONG HONGAO ELECTRIC POWER TECHNOLOGY Co Ltd
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SHANDONG HONGAO ELECTRIC POWER TECHNOLOGY Co Ltd
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Abstract

The utility model discloses an energy-saving device for a heat power plant, and particularly discloses an expansion power energy-saving system with high flow, low parameter and high back pressure. The expansion power energy-saving system with high flow, low parameter and high back pressure comprises a pressure cylinder and a heat supply and water return heater which are arranged in a steam turbine and are connected by a pipeline, wherein the heat supply and water return heater is connected with a heat supply and water return main pipe and a drain pipe of the heat supply and water return heater; and the drain pipe of the heat supply and water return heater is connected with a heat returning and heating system of the steam turbine. The expansion power energy-saving system is characterized in that an expansion power unit is mounted on the pipeline between the pressure cylinder and the heat supply and water return heater in the steam turbine. According to the expansion power energy-saving system with high flow, low parameter and high back pressure, on the premise of no influence on the heat supply requirement, the heat transfer loss between steam and hot water for supply heat is reduced to the minimum extent and part of energy in heat supply exhausted steam is converted into high-grade energy for outputting, thereby obtaining the energy-saving effect. The expansion power unit outputs the work for dragging a power generator or other power equipment.

Description

Big flow, low parameter, high back pressure expansion power energy-saving system
(1) technical field
The utility model relates to a kind of Thermal Power Station energy saving device, particularly a kind of big flow, low parameter, high back pressure expansion power energy-saving system.
(2) background technique
300MW generator set condensing back pressure is taken out generally at 0.0039~0.0054MPa in the power station now, and obviously, the back pressure type heat supply can't be satisfied the heat supply requirement, so must take extraction for heat supply.And during extraction for heat supply, because of the steam turbine structural limitations, the intermediate pressure cylinder exhaust steam pressure that part of generating units is extracted out is about 0.4MPa.And externally the heating supply water temperature is generally between 90~110 degree, and return water temperature can meet the demands by the steam of this calculating pressure at 0.1~0.15MPa at 60~70 degree.So heat supply is drawn gas-and the direct and heat supply hot water heat exchange of intermediate pressure cylinder steam discharge, there is very big energy loss.For pure back pressure heat supply unit, though can effectively solve steam and heat supply hot water energy loss problem, its non-heating period generating hear rate will increase greatly, can not accomplish effectively energy-conservation.How effectively to solve the energy loss problem that the 300MW generator set exists about extraction for heat supply,, also do not have effective scheme at present under the low operating mode of the parameter of drawing gas (extraction pressure 0.5MPa is following).
(3) summary of the invention
The utility model is in order to remedy the defective of prior art, and a kind of energy loss and the big flow that off-energy is made full use of, low parameter, high back pressure expansion power energy-saving system of reducing is provided.
The utility model is achieved by the following technical solution:
A kind of big flow, low parameter, high back pressure expansion power energy-saving system, comprise the Steam Turbine Through IP Admission and the heat supply backwater heater that are connected by pipeline, heat supply backwater heater is connected with the heat supply backwater and is responsible for and heat supply backwater heater condensate pipe, heat supply backwater heater condensate pipe is connected with the steam turbine back heating system, it is characterized in that: on the pipeline between Steam Turbine Through IP Admission and the heat supply backwater heater expansion motive power machine is installed.
This big flow, low parameter, high back pressure expansion power energy-saving system, pipeline between Steam Turbine Through IP Admission and the expansion motive power machine is provided with the fork, the place, fork is connected with by another pipeline and regulates butterfly valve and turbine low pressure cylinder, turbine low pressure cylinder is connected with vapour condenser, and vapour condenser is connected with vapour condenser circulating water main water outlet pipe, the female pipe of vapour condenser circulating water water inlet and vapour condenser and coagulates the water person in charge.Heat supply backwater heater outlet end connects a spike heat supply heater, the one spike heat supply valve that draws gas is installed between the pipeline of spike heat supply heater and expansion motive power machine front side, spike heat supply heater is connected with spike heat supply heater condensate pipe and heat supply water supply is responsible for, and spike heat supply heater condensate pipe is connected with the steam turbine back heating system.
The beneficial effects of the utility model are: this big flow, low parameter, high back pressure expansion power energy-saving system, under the prerequisite that does not influence the heat supply requirement, heat transfer loss between steam and the heat supply hot water is reduced to bottom line, the part energy changed into high-grade merit amount output during heat supply drawn gas, thereby obtained energy-saving effect.The expansion motive power machine leaving momentum can drawing generator or other power equipments.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing 1 is the structural representation of the big flow of the utility model, low parameter, high back pressure expansion power energy-saving system.
Among the figure, 1 Steam Turbine Through IP Admission, 2 regulate butterfly valve, 3 turbine low pressure cylinders, 4 vapour condenser circulating water main water outlet pipe, the female pipe of 5 vapour condenser circulating waters water inlet, 6 vapour condenser, 7 vapour condenser coagulate water and are responsible for 8 expansion motive power machines, 9 heat supply backwater are responsible for, 10 heat supply backwater heaters, 11 heat supply backwater heater condensate pipes, 12 spike heat supply heaters, 13 spike heat supply heater condensate pipes, 14 heat supplies supply water to be responsible for, the 15 spike heat supplies valve that draws gas.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This big flow, low parameter, high back pressure expansion power energy-saving system, comprise the Steam Turbine Through IP Admission 1 and the heat supply backwater heater 10 that are connected by pipeline, heat supply backwater heater 10 is connected with the heat supply backwater person in charge 9 and heat supply backwater heater condensate pipe 11, heat supply backwater heater condensate pipe 11 is connected with the steam turbine back heating system, it is characterized in that: on the pipeline between Steam Turbine Through IP Admission 1 and the heat supply backwater heater 10 expansion motive power machine 8 is installed.Pipeline between Steam Turbine Through IP Admission 1 and the expansion motive power machine 8 is provided with the fork, the place, fork is connected with by another pipeline and regulates butterfly valve 2 and turbine low pressure cylinder 3, turbine low pressure cylinder 3 is connected with vapour condenser 6, and vapour condenser 6 is connected with vapour condenser circulating water main water outlet pipe 4, the female pipe 5 of vapour condenser circulating water water inlet and vapour condenser and coagulates the water person in charge 7.Heat supply backwater heater 10 outlet end connect a spike heat supply heater 12, the one spike heat supply valve 15 that draws gas is installed between the pipeline of spike heat supply heater 12 and expansion motive power machine 8 front sides, spike heat supply heater 12 is connected with spike heat supply heater condensate pipe 13 and heat supply water supply is responsible for 14, and spike heat supply heater condensate pipe 13 is connected with the steam turbine back heating system.
This big flow, low parameter, high back pressure expansion power energy-saving system, at be that the 300MW unit utilizes the intermediate pressure cylinder steam discharge as heat source, extraction pressure<0.5MPa, extraction flow 100~500t/h, and the extraction for heat supply occasion that the required exhaust steam pressure of extraction for heat supply is 0.1~0.15MPa.During running, the steam discharge of Steam Turbine Through IP Admission 1, under the effect of regulating butterfly valve 2, a part of steam enters expansion motive power machine 8, promotes its vane and rotates also externally output work.Through behind the expansion motive power machine 8, vapor pressure reduces, and the saturation temperature of its pressure correspondence is higher than about heat supply hot water temperature 10 degree, enters heat supply backwater heater 10 then, heating heat supply network heat supply backwater.It is hydrophobic that heat supply backwater heater 10 generates, and delivers to the steam turbine back heating system by heat supply backwater heater condensate pipe 11.If extreme cold weather, heat supply backwater heater 10 adds heat can not satisfy the heat supply network heat load, open the spike valve 15 that draws gas, make part Steam Turbine Through IP Admission steam discharge enter spike heat supply heater 12 heating heat supply hot water, spike heat supply heater 12 the hydrophobic of generation are delivered to the steam turbine back heating system by spike heat supply heater condensate pipe 13.Other parts of Steam Turbine Through IP Admission steam discharge then enter turbine low pressure cylinder 3 by regulating butterfly valve 2, acting then, and exhaust steam enters vapour condenser 6 condensations.Control the draw gas switching of valve 15 of spike heat supply according to weather temperature or heat supply return water temperature, control the steam flow that enters expansion motive power machine 8 by regulating butterfly valve 2, and the draw gas aperture of valve 15 of spike heat supply is determined in the temperature in heat supply backwater heater 10 outlet ports by heat supply hot water.

Claims (3)

1. a big flow, low parameter, high back pressure expansion power energy-saving system, comprise the Steam Turbine Through IP Admission (1) and the heat supply backwater heater (10) that are connected by pipeline, heat supply backwater heater (10) is connected with the heat supply backwater and is responsible for (9) and heat supply backwater heater condensate pipe (11), heat supply backwater heater condensate pipe (11) is connected with the steam turbine back heating system, it is characterized in that: on the pipeline between Steam Turbine Through IP Admission (1) and the heat supply backwater heater (10) expansion motive power machine (8) is installed.
2. big flow according to claim 1, low parameter, high back pressure expansion power energy-saving system, it is characterized in that: the pipeline between Steam Turbine Through IP Admission (1) and the expansion motive power machine (8) is provided with the fork, the place, fork is connected with by another pipeline and regulates butterfly valve (2) and turbine low pressure cylinder (3), turbine low pressure cylinder (3) is connected with vapour condenser (6), and vapour condenser (6) is connected with vapour condenser circulating water main water outlet pipe (4), the vapour condenser circulating water female pipe of water inlet (5) and vapour condenser and coagulates the water person in charge (7).
3. big flow according to claim 1, low parameter, high back pressure expansion power energy-saving system, it is characterized in that: heat supply backwater heater (10) outlet end connects a spike heat supply heater (12), the one spike heat supply valve (15) that draws gas is installed between the pipeline of spike heat supply heater (12) and expansion motive power machine (8) front side, spike heat supply heater (12) is connected with spike heat supply heater condensate pipe (13) and (14) are responsible in heat supply water supply, and spike heat supply heater condensate pipe (13) is connected with the steam turbine back heating system.
CN2010206177534U 2010-11-22 2010-11-22 Expansion power energy-saving system with high flow, low parameter and high back pressure Expired - Fee Related CN201916008U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102011616A (en) * 2010-11-22 2011-04-13 山东泓奥电力科技有限公司 High-flow, low-parameter and high-backpressure expansion power energy-saving system
CN102817651A (en) * 2012-08-03 2012-12-12 北京中能蓝天节能技术开发有限公司 Dragging and heat-supplying multipurpose steam extracting backpressure small turbine and heat supplying system thereof
CN102828791A (en) * 2012-09-06 2012-12-19 中国电力工程顾问集团华东电力设计院 Thermal power plant and united thermodynamic system for thermal power plant
CN102828792A (en) * 2012-09-06 2012-12-19 中国电力工程顾问集团华东电力设计院 Thermal power plant combined heat system and thermal power plant
CN105089724A (en) * 2015-08-07 2015-11-25 李俊峰 Boiler feed water heating system of paralleling operation steam turbine units
CN103835777B (en) * 2014-03-10 2016-04-06 国电龙源电力技术工程有限责任公司 Steam grading heating device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102011616A (en) * 2010-11-22 2011-04-13 山东泓奥电力科技有限公司 High-flow, low-parameter and high-backpressure expansion power energy-saving system
CN102817651A (en) * 2012-08-03 2012-12-12 北京中能蓝天节能技术开发有限公司 Dragging and heat-supplying multipurpose steam extracting backpressure small turbine and heat supplying system thereof
CN102828791A (en) * 2012-09-06 2012-12-19 中国电力工程顾问集团华东电力设计院 Thermal power plant and united thermodynamic system for thermal power plant
CN102828792A (en) * 2012-09-06 2012-12-19 中国电力工程顾问集团华东电力设计院 Thermal power plant combined heat system and thermal power plant
CN102828792B (en) * 2012-09-06 2015-04-08 中国电力工程顾问集团华东电力设计院 Thermal power plant combined heat system and thermal power plant
CN102828791B (en) * 2012-09-06 2015-07-01 中国电力工程顾问集团华东电力设计院 Thermal power plant and united thermodynamic system for thermal power plant
CN103835777B (en) * 2014-03-10 2016-04-06 国电龙源电力技术工程有限责任公司 Steam grading heating device
CN105089724A (en) * 2015-08-07 2015-11-25 李俊峰 Boiler feed water heating system of paralleling operation steam turbine units
CN105089724B (en) * 2015-08-07 2018-02-06 李俊峰 A kind of vapor wheel unit boiler feedwater heating system of paired running

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110803

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